The Belgium international is best known to Premier League fans for his spell at Arsenal, registering 150 appearances across all competitions and lifting the FA Cup with the Gunners back in 2014.
The experienced centre-back moved to Barcelona in summer 2014 but has endured a troubled tenure at the Nou Camp, with injuries limiting him to just eleven appearances in La Liga.
The 30-year-old looks set to leave the El Clasico giants this summer and despite his recent injury problems, Sport claim two clubs are interested in bringing him back to the Premier League – Liverpool and West Ham.
The Hammers appear to be in the market for high-profile signings to mark their historic move to the Olympic Stadium, whilst Jurgen Klopp is expected to address the Reds’ defensive deficiencies this summer.
However, Primeira Liga outfit Benfica are also interested in signing the former Ajax man.